I have searched on google for either a canon xti replacement battery and for a xti battery grip. I found a few but to be honest do not know which aftermarket batteries are reliable. I have seen a replacement battery on radioshack which is the only site I was able to recognize. I saw a actual canon battery grip but don't think that the $220 price tag is worth for the camera I have. If there is a reliable after market battery grip, it will do.
Any suggestions appreciated.